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Worcester boiler buzz fading 37cdi

Discussion in 'Plumbing and Central Heating' started by Blaine1944, 5 Nov 2019.

  1. Blaine1944


    3 Dec 2017
    Thanks Received:
    United Kingdom
    Hi, got a 10yrs old WB greenstar 37cdi. Runs nicely but every few minutes has a loud buzz that fades in then back out, lasts for a few seconds and then fades out. Definitely not the pipe work or snagging. Can happen any time, not just upon fire up or shutting down. Any ideas? Thanks
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